Phil in SF quoted Why We Remember by Charan Ranganath
Memory is far more than a record of the past. In this groundbreaking tour of …
As expected from what we knew of previous research in rats and monkeys, responses in the reward-learning circuit did not necessarily shoot up in response to the reward feedback, but rather in response to the extent to which the reward deviated from what was expected.
— Why We Remember by Charan Ranganath (Page 270 - 271)